Instructions - Water Heater Timers Save Money

ELECTROMECHANICAL TIME CONTROLS
KM2 In-Wall Timers
Replaces standard wall switch to provide automatic
control of outdoor or indoor lighting, fans, pumps,
office machines, and other types of circuits. Captive
trippers are easy to set, can’t be lost. 72 trippers provide
up to 36 ON/OFF events in 24 hour period.
Synchronous drive for low cost and greatest accuracy.
Three way, OFF/AUTO/ON override switch provides
continuous ON or OFF positions.
FEATURES
✪ 24 hour or 7 day time switch program
✪ Captive trippers with 20 minute switching interval
(2-1/3 hr. for 7 day)
✪ Reliable synchronous timer motor
✪ SPST or SPDT 20A, 1HP @ 120V switch
✪ ON/AUTO/OFF manual switch
✪ Mounts to standard electrical wall boxes
✪ Available with 2, 3, or 4-gang wallplates with toggle switch openings,
or 2-gang wallplates with either duplex receptacle or decorator
opening
✪ Three way (SPDT) switch available
✪ Dual timer allows control of two separate circuits with different time
schedules
✪ Optional clear plastic dial cover to deter tampering
✪ UL and Canadian UL Listed (File E83486)
1-gang
SPECIFICATIONS
Clock Input: 120VAC, 60Hz
SPST and SPDT Switch Rating:
20A @ 120VAC, 60Hz
2400W Resistive
8A Inductive
1HP @ 120VAC
1350W Tungsten
Environmental Ratings:
Operating Temperature Range:
–40°F to 180°F (–40°C to 85°C)
Operating Humidity: 0 to 95% non-condensing
Wiring Connections: Three #14AWG leadwires
ORDERING DATA – 120V, 60Hz Models
4-gang/toggle
2-gang/toggle
2-gang/decorator
24 Hour 7 Day
Model Code Model Code Description Switch
KM2 ST-1G KM2 SW-1G single gang 20A, SPST
KM2 STu-1G KM2 SWu-1G three-way single gang 20A, SPDT
KM2 ST-2G KM2 SW-2G 2-gang/toggle opening 20A, SPST
KM2 ST-2R KM2 SW-2R 2-gang/receptacle opening 20A, SPST
KM2 ST-2D KM2 SW-2D 2-gang/decorator opening 20A, SPST
KM2 ST-3D KM2 SW-3D 3-gang/decorator opening 20A, SPST
KM2 ST-3G KM2 SW-3G 3-gang/toggle openings 20A, SPST
KM2 ST-4G KM2 SW-4G 4-gang/toggle openings 20A, SPST
KM2 STST-2G KM2 SWSW-2G 2-gang/dual timer (2) 20A, SPST
Accessories: DC-KM clear plastic dial cover.
Dual Timer
(2-gang with 2 KM2’s)

Installation
TO THE INSTALLER
1. Read the operating instructions carefully.
2. Check the input and output ratings marked on the
unit to make sure this product is suitable for your
application.
3. Disconnect power supply prior to installation to prevent
electrical shock.
4. Damage to the contacts caused by short circuiting
will void warranty.
5. Wire in accordance with National and local electrical
code requirements.
BE SURE ALL CONNECTIONS ARE SECURE.
DOUBLE CHECK ALL TWIST-ON WIRE CON-
NECTORS.
6. Mount timer into wall box using supplied screws.
7. If timer does not operate, check that the timer’s black
wire is connected to hot line and not the load. If necessary,
reverse connections to red and black wires.
Manual Operation
The slide switch provides manual operation of the
load, overriding the timer. Set to the “OFF” position,
the load will be continuously off, and if set to “ON”, it
will be continuously on. For automatic timed on’s and
off’s, the switch must be in the “AUTO” position.
Wiring Diagram
Programming
The timer dial contains 72 “trippers” which, when set
at the inner perimeter of the dial, will turn the switch
“ON” at the time adjacent to the tripper. The switch will
return to the “OFF” position when the timer progresses
past the inward trippers.
The 72 trippers allow multiple on/off sequences with a
minimum on or off time of 20 min. To program, set all
trippers inward for the duration of the on event.
For example, to turn lights on at 5:00pm and off at
11:00pm, leave inward the 18 trippers between 5 and
11 on the “pm” side of the dial. Make sure manual
switch is in the “AUTO” position.
NOTE: For any times where “OFF” programming is
desired, the trippers must be moved to the outer
perimeter of the dial.
Setting The Time
Rotate the dial clockwise until the correct time and
“am” or “pm” is opposite the arrow on the plate.
CAUTION: Do not turn dial counter-clockwise, as the
timer will be damaged.
ONE YEAR WARRANTY
If this unit fails due to a defect in material or workmanship
within one year after purchase, Grasslin
will repair or replace the unit free of charge. This
warranty does not apply to damage due to accidents,
abuse, mishandling nor to units not used in
accordance with directions. This warranty gives you
specific legal rights, and you may also have other
rights which vary from state to state.
LINE (BLACK)
LOAD (RED)
LOAD
NEUTRAL (WHITE)
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Printed in USA 092 05.01